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Rated boat velocities in knots|
Wind Velocity
| 4 kt
| 6 kt
| 8 kt
| 10 kt
| 12 kt
| 14 kt
| 16 kt
| 20 kt
| 24 kt
|
| Beat Angles | 43.8° | 43.8° | 42.0° | 40.4° | 38.1° | 37.1° | 36.7° | 36.8° | 37.8° |
| Beat VMG | 2.23 | 3.09 | 3.80 | 4.32 | 4.66 | 4.83 | 4.90 | 4.94 | 4.90 |
| 52° | 3.47 | 4.74 | 5.68 | 6.23 | 6.50 | 6.65 | 6.72 | 6.80 | 6.82 |
| 60° | 3.70 | 5.00 | 5.91 | 6.39 | 6.65 | 6.80 | 6.89 | 6.99 | 7.05 |
| 75° | 3.84 | 5.15 | 6.03 | 6.51 | 6.79 | 6.99 | 7.14 | 7.33 | 7.46 |
| 90° | 3.78 | 5.17 | 6.19 | 6.71 | 7.02 | 7.23 | 7.40 | 7.68 | 7.92 |
| 110° | 3.79 | 5.19 | 6.21 | 6.74 | 7.12 | 7.46 | 7.80 | 8.59 | 9.25 |
| 120° | 3.62 | 5.00 | 6.05 | 6.63 | 7.01 | 7.37 | 7.75 | 8.72 | 10.16 |
| 135° | 3.12 | 4.42 | 5.52 | 6.29 | 6.74 | 7.09 | 7.44 | 8.25 | 9.73 |
| 150° | 2.57 | 3.73 | 4.78 | 5.65 | 6.31 | 6.73 | 7.06 | 7.73 | 8.60 |
| Run VMG | 2.22 | 3.23 | 4.14 | 4.89 | 5.60 | 6.16 | 6.58 | 7.21 | 7.85 |
| Gybe Angles | 143.9° | 143.9° | 147.1° | 148.9° | 160.9° | 168.0° | 178.6° | 179.0° | 179.3° |
APH ToD:608.4CDL: 7.673APH ToT: 0.9861CertNo:0009.9
BOATClassYokoyama 30DesignerTokaiBuilderTokaiAge date11.1981Series date01.1981Offset fileJCBIY16b.offData fileRU0009 Princess
HULLLength Overall9.448 mMaximum Beam3.314 mDraft1.795 mDisplacement3 300 kgDLR8.6265IMS DivisionCruiser/RacerDynamic Allowance0.280%Age Allowance0.487%
PROPELLERInstallationShaft exposedTypeFolding 3 bladesDiameter0.450m
CREWMaximum weight760 kg(declared)Minimum weight630 kg
✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS
(m²)
MeasuredRatedMainsail26.8227.15Headsail Luffed24.4524.45Headsail FlyingSymmetric56.5356.53Asymmetric57.1257.12
(All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS
(m²)
Trysail8.48Storm Jib5.17Heavy Weather Jib13.95
SAIL LIMITSHeadsails5✱ Woven polyester sails
Spinnakers4✱ Asymmetric may be tacked on the pole
STABILITYRighting MomentN/AStability IndexN/A
COMMENTSbulb - loa -1200 mm/ width -240 mm
The owner and any other person in charge is responsible that boat is complying with her certificate in accordance with RRS 78.1 and
ORC Rule 304.
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Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)ClassYokoyama 30Measurement31.05.2019HINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA9.448Max. Beam3.314Draft1.795Displacement3 300Wetted area19.07IMS L7.880LSM07.259Acc. length9.448Sink (kg/mm)
13.28
VCGD0.077VCGM0.059RM Rated
(kg·m)
66.8Limit of positive stability(°)
N/AStability IndexN/ADefault crew weight436Declared crew weight760
PROPELLERPropeller TypeFolding 3 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.450PBW0.120PIPA0.0090
PSD0.025PHD0.100PHL0.120
PSA35.0°ESL0.600
ST10.010ST20.090ST30.100
ST40.050ST50.140
RIGForestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footRunning backstays2CheckstaysSpreaders2Rotating mastNo
P11.610IG10.163ISP10.763MDT10.092MDL10.145MDT2MDL2TLTaperMWGO
E4.170J3.050BAS1.300FSDSFJSPL3.200WPLTPS3.930BDMWTMCG
Flying Headsail Foretriangles
IdISPTPS
FLOTATION AND STABILITYCalculation methodRM estimatedFlotation Date31.05.2019MeasurerRUS 92
INVENTORYFixed Ballast Total0
Total deductible
Total deductible
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MAINSAILIdMHBMUWMTWMHWMQWAreaMeas.DateComment20.150.751.352.403.3326.8222.08.2019
MIZZENIdMHBMUWMTWMHWMQWAreaMeas.DateComment
HEADSAILIdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment70.050.611.182.353.574.8910.20NoNo 24.4527.08.20191IZTMS0.060.571.112.273.454.709.94NoNo 22.9227.06.20191 old0.060.571.112.283.454.609.94NoNo 22.7827.06.201920.060.500.961.982.984.019.94NoNo 19.7727.06.201930.060.350.671.492.413.399.94NoNo 15.7527.06.2019
SYMMETRIC SPINNAKERIdSLUSLESLSHWSFLAreaMeas.DateComment411.1811.1811.186.105.9456.5309.06.2024310.3410.3410.345.535.2347.1330.08.2016
ASYMMETRIC SPINNAKERIdSLUSLESLSHWSFLRatioAreaMeas.DateComment511.7710.6011.196.046.4893%57.1214.08.2019
MIZZEN STAYSAILIdYSHFYSHWYSFLAreaMeas.DateComment
QUADRILATERALIdQLEQHLQFLQCDQLMMastAreaMeas.DateComment
CRUISER/RACER REQUIREMENTS*Accommodation length9.4 mTable area0.44 m²Headroom1.66 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity68 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity38 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.